Remarkable. Refined.

IO (Eye-Oh) is a special earphone. It is a remarkably expressive earphone. It delivers a refined sound that is also exciting.

Many more iterations and unique prototypes were made of Io than any other earphone in Campfire Audio’s line up to date. It was a journey to fine tune the sound and get it right. The result is an earphone that we can proudly stand next our best-known models. We feel confident you will enjoy the result of this effort.

Remarkable. Refined.

IO is a special earphone. It is a remarkably expressive earphone. It delivers a refined sound that is also exciting.

Many more iterations and unique prototypes were made of Io than any other earphone in Campfire Audio’s line up to date. It was a journey to fine tune the sound and get it right. The result is an earphone that we can proudly stand next our best-known models. We feel confident you will enjoy the result of this effort.

Each earphone is assembled by hand in our workshop in Portland, Oregon by our team of highly skilled craftspeople.

Insides that Count

Driver count has never been as especially important to our designs as the proper selection and implementation of particular drivers. When using more than a single driver, it is as much about the synergy between drivers as it is about any one particular driver.

Staying true to the Campfire Audio design philosophy “Less is More” and using fewer, higher quality components is ideal to achieve a more a musical presentation.

Using an oversized woofer BA as a foundation and then pairing that with a small tweeter, IO came together. Our Tuned Acoustic Expansion Chamber (T.A.E.C.™) provides that natural and open top-end extension people have come to expect from Campfire Audio earphones.

Insides that Count

Driver count has never been as especially important to our designs as the proper selection and implementation of particular drivers. When using more than a single driver, it is as much about the synergy between drivers as it is about any one particular driver.

Staying true to the Campfire Audio design philosophy “Less is More” and using fewer, higher quality components is ideal to achieve a more a musical presentation.

Using an oversized woofer BA as a foundation and then pairing that with a small tweeter, IO came together. Our Tuned Acoustic Expansion Chamber (T.A.E.C.™) provides that natural and open top-end extension people have come to expect from Campfire Audio earphones.

New Cable + New Case

Building from our Silver Plated Copper Litz wire conductors and our popular tangle-resistant twisted cable weave, we’ve added a new stylish Smoky jacket to compliment the unique finish of our new line of earphones. A new light-weight molded ear-hook design replaces the memory wire. The result is a light weight cable that is a pleasure to use everyday.

Our exciting new premium ‘Bordeaux’ leather protective zipper case is an update to our standard leather earphone case. Luxurious leather surrounds a substantial and protective rubber barrier that ensures that your earphones will remain safe while in transit. The interior is a dense faux wool lining that preserves the anodized finish of your earphones. Each case is made in Portugal by a small team of skilled crafts people that share our commitment to quality.

Designer Statement

IO is an exciting and exceptionally expressive earphone. The sonic performance stands with our best work to date. It has an excellent vocal presence. There is a splashy energy to its musical delivery that I think many people will really enjoy.

Ken Ball

Designed and Assembled in Portland, Oregon USA

Each unit is assembled by hand in our workshop by our small team of highly skilled craftspeople. From driver to body each component part is carefully examined and tested. After each unit is built, it is placed into a pairing pool, where it finds its ideal sonic match.

Premium Custom Connectors

Our custom Beryllium Copper MMCX eliminates the traditional shortcomings of the connection and harnesses all of its benefits. Beryllium Copper provides a robust mating mechanism; one that is typcially made from soft brass. This selection of a harder material extends the life of the component and the earphone.

2 year Warranty

Each unit we make is backed by our 2-Year Limited Product Warranty. Rest assured when you purchased a Campfire Audio earphone, it will be a great ownership experience. Learn more about product warranty and product repair policy here. Warranty

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2 reviews for IO

Chris (verified owner)–May 3, 2019

Rated 4 out of 5

My first CA purchase and it won’t be the last! From the packaging and build quality to the the luxurious accessories; it all screams QUALITY!

Sonically, these are definition of clarity. That have a fairly reference tuning with ever so slightly forward mids. They’re super comfortable (I’ve been wearing them all day at work), and the signature is non fatiguing. If I were nitpicking, a little more heft in the sun bass wouldn’t go amiss. Al in all though – these are an absolute steal at this price point.

Jon (verified owner)–May 19, 2019

Rated 5 out of 5

Package is first class, from the light wire to the earphones. They are very comfortable ans isolation is very good. Sonically fabulous mids and highs. The bass is just right. They have become my reference. For the price you just can’t go wrong. To top it off valuable warranty.